Multi-zone temperature modulation system for bed or blanket

ABSTRACT

A temperature modulation system for a bed, blanket, or other furniture includes a fluid for moderating temperature change, a number of conduit circuits for directing the fluid through respective zones, a control unit including a thermoelectric device for modulating temperature of the fluid, and a pump. Each of the conduit circuits selectively and independently directs fluid through its respective zone in order to produce a temperature within the zone that is independent of the temperature outside the zone. The system also includes an arrangement of one or more zones in an arrangement in which the control unit is programmed to vary the zone temperature over time according to a schedule.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/684,648, filed Nov. 15, 2019, which is a continuation of U.S.application Ser. No. 15/961,134, filed Apr. 24, 2018, now U.S. Pat. No.10,477,978, which is a continuation of U.S. application Ser. No.15/482,148, filed Apr. 7, 2017, now U.S. Pat. No. 10,667,622, which is acontinuation of U.S. application Ser. No. 12/203,241, filed Sep. 3,2008, which claims the benefit of U.S. Provisional Patent ApplicationNo. 61/084,995, filed Jul. 30, 2008, each of which is incorporatedherein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates generally to heating and cooling systemsfor bed mattresses, blankets, and other furniture, and more generally toa multi-zone temperature modulation system whereby each zone may beselectively and independently heated or cooled to a target temperature.

BACKGROUND OF THE INVENTION

It is desirable to control the temperature of a bed or other piece offurniture that supports a person, such as when sleeping. Such controlhas therapeutic value in treating symptoms of menopause or conditions ofhypothermia or hyperthermia, particularly when those conditions manifestthemselves over a long period of time. Therapeutic value may also beseen for individuals who have circulatory disorders, sleep disorders,and other conditions that may be improved by increasing the comfort feltduring sleep. Such control can be desirable even outside the therapeuticvalue of cooling or heating a mattress, simply to match the personalcomfort preferences of healthy individuals, or to provide localizedcontrol when a more general control, such as heating or air conditioningof a sleeping space, is unavailable or when adjustments to the generalcontrol would cause others discomfort or would be inefficient from anenergy consumption perspective.

Various methods of temperature control are known, including such classicsystems as electric blankets or heating pads, as well as more recentdevelopments that involve the circulation of a heated or cooled fluidthrough a mattress, such as directing air through the chambers of an airmattress or directing air or a fluid through a tube that is embeddedwithin a mattress or a mattress topper. The more advanced of thesesystems utilize a heat source or sink (i.e., cooling source) to heat orcool a reservoir of fluid to a selected target temperature and pump theheated or cooled fluid through the available conduit, relying onprinciples of heat exchange to control the mattress temperature.

In connection with the known methods of accomplishing temperaturecontrol, there are various problems and deficiencies that render theseknown methods ineffective or less than fully effective at achievingtemperature control under optimal conditions. For example, such systems,particularly those that are designed for cooling, can be fairly noisy,thereby interfering with the subject individual's ability to sleep anddefeating many of the therapeutic aspects of such systems.

Of somewhat more universal importance, however, is the lack ofspecificity such systems have in controlling temperatures in variouszones of coverage, when the user desires different temperatures indifferent zones. A user that desires a particular temperature forsleeping may share his or her bed with another person who desires adifferent temperature for sleeping—a situation that may lead toarguments, one user's lack of comfort, or a compromise that leavesneither partner happy. Another user may desire, for example, a certaintemperature for the majority of his or her body but a somewhat warmertemperature for his or her feet, or a somewhat cooler temperature forhis or her head.

In order to satisfy the need for multiple zones, conventional systemshave heretofore utilized multiple apparatuses to conductzone-independent temperature modulations. In the situation where the bedis to be shared, each side of the bed may be provided with its ownindependent temperature control apparatus. A similar arrangement couldpotentially be used for different zones associated with a single user.However, conventional arrangements that require multiple independentsystems require substantial duplication of the most expensive andpotentially noisy parts of a conventional temperature control system—thecirculation pump and the heating or cooling source.

Yet another issue with conventional single-zone systems is that they arenot programmatically controllable over time. Although some systemsprovide for thermostatic control to prevent overheating or overcooling,some users may desire, for example, a warmer temperature at bedtime anda cooler temperature later in the sleep cycle, or vice versa. Thesesystems are even more deficient when the user wishes to coordinatevarying temperatures in various zones with various stages of the sleepcycle in order to promote deeper and more satisfying sleep.

Although many of the applications of the present invention relate tosleep and beds, the invention is equally applicable to other types ofsupport furniture, such as chairs, or to more portable systems, such aswheelchair cushions, blankets, or mattress toppers.

What is needed is a multi-zone temperature modulation system thatenables selective and independent heating or cooling of specific zonesusing a single heating or cooling apparatus and pump to minimize thecost efficiency of manufacture, and that may be programmaticallycontrolled to vary the target temperature over time according topersonal comfort or sleep cycle considerations.

SUMMARY OF THE INVENTION

In accordance with the aforementioned needs, the present inventionincludes a temperature modulation system for a bed that uses a fluid,such as a liquid or a gas, as the medium for temperature change at asurface of the bed. The fluid is directed through at least two conduitcircuits that traverse respective independent zones, utilizingprinciples of heat exchange to heat or cool the bed surface. Theinvention employs a thermoelectric device to modulate the temperature ofthe fluid and a pump, such as a multichannel pump or a pump incombination with a multi-way valve, to pump the fluid through theconduit circuits. In this arrangement, each of the conduit circuitsselectively and independently directs fluid through its respective zoneto achieve a temperature of the mattress within the zone that isindependent of the temperature of the mattress outside that zone.

In another feature of the present invention, a valve, which may bemechanically or electrically operated, may be used selectively to directfluid through the various conduit circuits at different rates to producedifferent levels of temperature change in different zones. Such anarrangement may be flow-based, in which a given flow of fluid is dividedamong zones, or a time-division arrangement, in which the full flow offluid is directed sequentially through the zones as needed to producethe target temperature of each.

In yet another feature of the invention, multiple components, such aspumps and valves, may be utilized to achieve the appropriate temperaturein each of multiple zones.

The system of the present invention may produce heating alone, coolingalone, or both heating and cooling, as the user may require.

In still another feature of the invention, the system may be providedwith one or more temperature sensors, which are configured to measurethe temperature of the zone to provide feedback to a control mechanismin order to enable the system to reach the target temperature in eachzone more efficiently.

The system of the present invention may be embedded within the mattress,or it may be portable, being embedded in a topper or blanket that isdesigned to be placed over the mattress.

The system may be conveniently controlled by remote control, and whenthe system is integrated with the mattress, the remote control may belikewise integrated with other remotely controlled functions of themattress, such as firmness control (for an air-based mattress),vibration control, and the like.

In another feature of the invention, the system is provided with a portconnected to the constituent components (or to an internal controlmechanism for those components) that enables the system to be connectedto a computer for programmatic control of the operation of the system.

Alternatively, the present invention includes a multi-zone temperaturemodulation system for providing selective temperature change to a livingsubject. The system includes first and second independent zones, each ofwhich has a conduit circuit for directing fluid through the zone inorder to bring that zone's temperature to a target temperature. Asabove, a thermoelectric device selectively modulates the temperature ofthe fluids, at least one pump is used to pump the fluids through theconduit circuits. The fluid associated with one zone may be isolatedfrom fluid associated with the other zone, or those fluids may bepooled. The system may employ separate pumps for separate conduits, orit may employ a single pump, aided by a multi-outlet valve or othervalve types that permit separate flow to different circuits.

The present invention also alternatively includes a temperaturemodulation system for providing selective temperature change to a livingsubject on a time-based programmatic basis. As above, the systemincludes a fluid for moderating temperature change within a selectedzone adjacent the subject, and a conduit circuit for directing the fluidthrough the selected zone according to a selected target temperature. Athermoelectric device handles the heating or cooling, and a pump is usedto pump the fluid through the conduit circuit.

This alternative system also utilizes control means, such as ageneral-purpose or special-purpose computer that has been programmed, tocontrol operation. The control means may be programmed to control thezone temperature according to a schedule of target temperatures over aselected period of time.

Similar features to those described in connection with the embodimentdescribed first above may be utilized in the alternative systems.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features, embodiments, and advantages of the present inventionwill become apparent from the following detailed description withreference to the drawings, wherein:

FIG. 1 is an environmental view of a preferred embodiment of the presentinvention;

FIG. 2A is a plan view of a preferred embodiment as in FIG. 1;

FIG. 2B is a plan view of an alternative embodiment;

FIG. 2C is a plan view of another alternative embodiment;

FIG. 3 is a schematic view of a preferred embodiment of the presentinvention;

FIG. 4A illustrates a first preferred embodiment of a pump and valvesystem.

FIG. 4B illustrates a second preferred embodiment of a pump and valvesystem.

FIG. 4C illustrates a third preferred embodiment of a pump and valvesystem.

FIG. 5A illustrates a recliner chair with multiple independenttemperature zones.

FIG. 5B illustrates a multi-zone heating/cooling system contained withina blanket.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings, FIG. 1 illustrates the generalarrangement of a preferred embodiment of a multi-zone temperaturemodulation system 10 according to the present invention in anenvironmental perspective view. A bed 20 includes a support frame 21, abox spring foundation 22, and a mattress 23, all of conventionalconstruction. In the depicted embodiment, the mattress 23 has beenprovided with a topper 30 that has embedded within it a multi-zonetemperature modulation system 10 according to the present invention.Although the depicted embodiment illustrates a separate mattress topper30, those skilled in the art will recognize that it is equally possibleto combine the mattress 23 and topper 30 into a single piece, with thetemperature modulation system 10 effectively being embedded in themattress 23 itself. A separate mattress topper 30 may hold someadvantages over the combined construction because of the ability to usea separate topper 30 to retrofit an existing mattress 23.

The system 10 as depicted is divided generally into three temperaturezones 11,12,13, which correspond generally to the position of a person'shead and neck, trunk and legs, and feet when the person (not shown) lieson the mattress 23. The depicted system 10 is arranged to permit thethree zones 11,12,13 to be targeted for three independent temperatures.As used herein, the term “independent temperature” refers to a zonetemperature that is set or targeted without respect to the temperatureof another zone; an independent temperature may be the same temperatureas that of another zone, and there is no requirement that thetemperatures be different.

Although the embodiment depicted in FIG. 1 shows multiple zones arrangedfor a single person's use, other multi-zone arrangements are possible,and will be discussed in greater detail below. The present invention isnot limited to a particular number or arrangement of the zones; it issufficient for the multi-zone aspect of this invention that there bemore than one zone, regardless of the disposition of the zones.

In order to accomplish the temperature modulation of the zones 11,12,13,a set of conduit circuits 40, at least one per zone, is provided. Theseconduit circuits 40 may be formed of any suitable material, such asplastic or metal, or more preferably flexible silicone, selected withthe principal consideration being the ability of the conduit circuitmaterial to transmit heat to or from the topper 30. Depending on theconfiguration of the zone, it may be preferred to have more than oneconduit circuit 40 per zone, particularly in the case of a very largezone. The conduit circuit or circuits 40 repeatedly traverse the zone ina back-and-forth arrangement, in order to provide temperature modulationto the entire desired surface area of the zone. The conduit circuits 40are arranged to return to their starting point to enable the return offluid to the heating/cooling apparatus 50.

The heating/cooling apparatus 50 generally includes one or morereservoirs 60 for temperature modulation fluid 52, which may be aliquid, such as water, or a gas. In a preferred embodiment shown, wateris the fluid mediator for temperature modulation. The reservoir 60 isprovided with a device 62 for heating or cooling the liquid 52 storedtherein, such as a Peltier thermoelectric device. Such a device isgenerally well known and useful for its efficient movement of heat whena direct current is applied thereacross. The Peltier device 62 creates aheat source and a heat sink on its opposite sides, and if the directionof the current applied across it is reversed, the heat source and heatsink switch sides. This feature makes a Peltier device 62 ideal forsystems which require selective heating and cooling.

The Peltier device 62 is thus used to change the temperature of thereservoir fluid 52, i.e. heating or cooling the fluid 52 in order toheat or cool the zones 11,12,13, according to the position of a switchthat is under one of various forms of control to be discussed in moredetail below. In response to a need for heating or cooling a zone, fluidis drawn from the reservoir 60 and directed through the conduit circuits40 to effectuate the necessary temperature change. The application ofenergy necessary to move the fluid 52 through the conduit circuits 40 iseffectuated in a variety of possible ways, such as through the use of amultichannel pump, multiple single-outlet pumps, or a single-outlet pumpin combination with one or more valves.

Control 70, which is wireless as shown but which may alternatively beprovided with a wired connection to the heating/cooling apparatus 50, isused to set the target temperatures for each of the zones. Control 70 incombination with temperature probes 80 will enable the system tomaintain a target temperature in each zone 11,12,13 through theselective application of heated or cooled fluid to the conduit circuits40 in each zone. Using the control 70, a user will select an independenttarget temperature for each zone 11,12,13. Temperature probes 80 in eachzone will provide temperature data for that zone to the heating/coolingapparatus 50, which will by comparison of the target temperature setusing the control 70 and the actual measured temperature determinewhether to heat or cool the fluid 52 and determine to which conduitcircuit or circuits 40 the heated or cooled fluid 52 should bedistributed in order to make the actual temperature match the targettemperature.

In a preferred embodiment, the topper 30 or mattress 23 (for embeddeddesigns) will include padding 90 between the conduit circuits 40 and theresting surface, in order to improve the comfort of a user who lies uponthe system and to prevent the concentrated heat or cold of the conduitcircuits 40 from being applied directly or semi-directly to the user'sbody. Instead, the conduit circuits 40 will heat or cool the padding 90,which will provide more gentle temperature modulation for the user'sbody.

Referring now to FIGS. 2A-2C, various embodiments of the presentinvention are illustrated in plan view for comparative purposes, inorder to demonstrate the various zone arrangements that may be servicedaccording to the present invention. In FIG. 2A, the view is as in FIG.1, in which three zones 11,12,13, corresponding generally to the head,body and legs, and feet, respectively, of the subject utilizing thesystem. Although only three zones are shown, it is equally possible tohave two, four, or more zones of control. In FIG. 2B, another preferredembodiment is shown in which two sides of a two-person bed, such as afull, queen, or king size bed, are provided with two separate zones11,15. These zones may themselves be divided into zones or subzones12,13,14 and 16,17,18 as in FIG. 2A. In the arrangement shown in FIG.2B, two separate controls may be provided in order to enable each userto set his or her own preferences. In this embodiment, despite thepresence of two separate controls, a single heating/cooling apparatus 50may be utilized to control the temperature of reservoir fluid 52.

In FIG. 2C, another alternative embodiment is shown in which, again,there are three zones 11,12,13. For purposes of this embodiment, thearrangement could as easily encompass only a single zone 11, because thesignificance of this embodiment is in the control system 71. Instead ofa wireless handheld control, the heating/cooling apparatus 50 may beconveniently connected via a port 75 such as a USB, serial, or otherport to computer 71. Computer 71 has been programmed to control theoperation of the system 10 in accordance with a schedule of targettemperatures selected to correlate with sleep cycles of the user. Suchan arrangement may promote deeper, more restful sleep by altering bodytemperature at critical points. This arrangement will be discussed ingreater detail below.

Referring now to FIG. 3, a preferred embodiment of the present inventionis shown in a schematic view to illustrate in greater and moreconvenient detail the various components of the system. Zones 11,12 areprovided with conduit circuits 40 for directing a heated or cooled fluid52 therethrough. The fluid 52 is held in a reservoir 60 and heated orcooled using a Peltier device 62 or any other suitable means.Temperature probes 80 are located within the zones 11,12 and areconnected to the control unit 50, which contains computing apparatus 54,which may be a microprocessor, a circuit board containing logiccircuits, or any other suitable arrangement, the construction of whichis well known in the art to which the present invention relates.Computing apparatus 54 is attached to a user interface 70, which may invarious embodiments be a handheld wireless or wired remote control, apersonal computer, or other suitable input device. The user interface 70may be used to set the parameters of operation of the control unit 50.

The computing apparatus 54 is designed or programmed to operate thePeltier device 62 and more particularly to apply direct current of agiven polarity across the Peltier device 62, in order to heat or coolthe fluid 52 in the reservoir 60, as needed. The computing apparatus 54is also designed or programmed to operate a pump and valve system 110,various embodiments of which are illustrated in schematic detail inFIGS. 4A-4C. By manipulating the pump and valve system 110, thecomputing apparatus may control the manner in which heated or cooledfluid 52 is driven through the conduit circuits 40 to heat or cool thezones 11,12.

For example, in the beginning of use, a user, using the user interface70, may call for a target temperature of 60° F. in zone 11 and a targettemperature of 70° F. in zone 12. The temperature probes 80 may registerthe temperature of zone 11 as 75° F. in zone 11 and 74° F. in zone 12.The computing apparatus 54 therefore activates the Peltier device 62 incooling mode, to chill the reservoir fluid below 60° F. The computingapparatus 54 also activates the pump and valve system 110, causing fluid52 to flow through both conduit circuits 40, back and forth across thetwo zones 11,12, and returning to the reservoir 60. Over time, theactual temperature as measured by the temperature probes 80 decreases.At a given point, the temperature in zone 12 may be measured at thetarget of 70° F. The computing apparatus 54 then controls the pump andvalve system 110 to cause cooled fluid to stop flowing through zone 12,even as cooled fluid continues to flow through zone 11. Eventually, thetemperature in zone 11 will also reach the target. However, because thetemperature in zone 12 may rise, the pump and valve system may beadjusted one or more times during the process to maintain thetemperature in zone 12 at the target, while the temperature in zone 11continues to drop to the lower target temperature.

Those skilled in the art will recognize that programmatic control of thetarget temperatures over time, such as over the course of a night'ssleep, will be possible if a computer 70 is employed as the userinterface. Because the target temperatures may be set at any time, thosetarget temperatures may be manipulated through the sleeping period inorder to match user preferences or a program to correlate with usersleep cycles to produce a deeper, more restful sleep.

In the system heretofore described, the details of the pump and valvesystem 110 have been largely omitted. A system 110 according to thepresent invention will permit the elimination of duplicate parts,typically the most expensive parts of such an apparatus, such as theheating/cooling device 62 and the control apparatus 54, through thecreative use of one or more pumps and valves and principles of time andflow division.

Referring now to FIG. 4A, a first preferred embodiment of a pump andvalve system 110 is a multichannel pump 110 which includes an inlet 112which serves as a conduit for fluid from the reservoir 60 and a numberof outlets 114, each of which may be independently controlled to permitfluid 52 to flow or not to flow into a respective conduit circuit 40associated with a zone 11,12,13. In this arrangement, the multichannelpump 110 applies pressure to the fluid 52 and selectively opens eachoutlet 114 according to instructions from a control apparatus 54 (seeFIG. 3) to allow fluid to flow to the associated zone 11,12,13, thuscooling or heating the zone 11,12,13 in accordance with a differentialbetween the target temperature and the actual temperature for that zone.Because the outlets 114 are individually controlled, the flow of fluid52 may be divided among one or more outlets 114 at the same time.Alternatively, this arrangement may be used in a time-divisionarrangement, whereby the full flow of fluid 52 is directed seriallythrough the respective outlets 114 in order to achieve the same effect.

Referring now to FIG. 4B, a second preferred embodiment of a pump andvalve system 110 is illustrated. This arrangement is simpler in scopethan the embodiment shown in FIG. 4A, in that the pump 116 is physicallyseparated from the valve 118. The pump 116 is activated to provide fluidpressure, and the valve 118 is under the control of the controlapparatus 54, alternately directing the fluid from inlet 112 throughoutlets 114,114,114 serially in a time-division arrangement.

Referring now to FIG. 4C, another preferred embodiment of a pump andvalve system 110 is illustrated. In this arrangement, each zone 11,12,13is provided with its own pump 110 and valve 113, which independentlyoperates to provide fluid pressure through the associated conduitcircuit 40. This arrangement results in some duplication of components,but may be useful under certain circumstances in which there is a needto provide full flow of fluid 52 through each zone 11,12,13 at alltimes.

The principle of time division, as applied in the present invention,relies upon the tendency of the temperature of a given zone to remainfairly steady over time. That is, heating or cooling might need only beapplied for a few minutes per hour to keep the temperature of a givenzone at the target, while another zone may require fairly constantheating or cooling to maintain its target temperature. The controlapparatus 54 may thus divide the time among the zones in an efficientmanner that keeps each zone as near to its target temperature aspossible over the greatest period of time.

Although the arrangement illustrated in FIGS. 1 and 2A-2C is in amattress-type arrangement, such as a mattress 23 or a topper 30, it isequally possible to apply the concepts of the invention to othercontexts. For example, as in FIG. 5A, a recliner chair 25 is shown. Inmuch the same manner as is done with the mattress 23 or topper 30arrangements, the recliner chair 25 is provided with a number of zones11,12,13,14,15, each of which has an associated conduit circuit 40 underindependent temperature control by a control apparatus 50 as directed bya user interface 70. The operation of such a system is identical to thatdescribed above.

Also, as is illustrated in FIG. 5B, the concepts of the presentinvention are not limited to support furniture such as mattresses,chairs, and the like. A multi-zone heating/cooling system may becontained within a blanket 27, for example, which may be convenientlyplaced over or under the user to provide heating or cooling within givenzones 11,12. In such an arrangement, the use of flexible tubing for theconduit circuits 40 is important to promote the ability of the blanket27 to conform to the user's body.

Referring now to the drawings generally, a temperature modulation system10 for a bed 20 includes a fluid 52 for moderating temperature change ata surface 24 of the bed 20, a number of conduit circuits 40 fordirecting the fluid 52 through respective zones 11,12,13, and athermoelectric device 62 for modulating the temperature of the fluid 52.The system 10 also includes a pump 110 for pumping the fluid 52 throughthe conduit circuits 40. Each of the conduit circuits 40 selectively, byuse of a pump and valve system 110, and independently directs fluid 52through its respective zone 11,12,13 to achieve a temperature of themattress 23 of the bed 20 that is independent of the temperature of thebed 20 outside the zone 11,12,13.

The fluid 52 may be a liquid such as water, or it may be a gas such asair, depending upon the requirements of the system. The pump and valvesystem 110 may be a multichannel pump, or it may be a single pump with amulti-outlet valve, or it may include several pumps and valves. Theparticular type of pump and valve system chosen may be tied to thenature of the fluid 52. The valves 113 may be mechanically orelectrically operated, under the control of a control system 54 thatselectively opens and closes the valves 113 to permit fluid 52 to flowtherethrough.

The system 10 may be designed to operate on a flow-division or atime-division basis, the latter being characterized by permitting thefull flow of fluid 52 to be directed through a single conduit circuit 40for a given period of time, one at a time serially, to achieve thetarget temperature in each zone 11,12,13.

In order that the system 10 may control each zone individually,temperature sensing probes 80 are provided, which give feedback to thecontrol system 54 concerning the actual temperature of the given zone11,12,13.

Through the use of a Peltier thermoelectric device 62, it is possible toprovide heating and cooling using the same unit, thereby increasing theutility of the present invention in comparison to systems that provideonly heating or only cooling.

In the context of bed use, the system 10 may be integrated into themattress 23, or it may be a separate article such as a mattress topper30.

The system 10 may conveniently receive user input through a userinterface 70 such as a remote control, wired or wireless. Alternatively,the system may be provided with a port 75 to connect it to a computer 71such as a personal computer, in order to enable programmatic control ofthe system over time.

More generally, the present invention includes a multi-zone temperaturemodulation system 10 for providing selective temperature change to aliving subject. The system includes a first zone 11 that includes afirst conduit circuit 40 for directing a first fluid 52 therethrough, inorder to bring the first zone temperature to a target temperature forthe first zone. The system also includes a second zone 12 of similar butindependent construction, and the second zone 12 has a targettemperature that is independent of the target temperature of the firstzone 11. As above, this embodiment uses a thermoelectric device forselectively modulating the temperature of the first and second fluids,as well as at least one pump for pumping the fluids through the conduitcircuits. Similar features of this embodiment are provided as above.

This arrangement is applicable to a wide variety of contexts, includingbeds, mattress toppers, chairs, other support furniture, and blankets.

Yet another embodiment involves the use of at least one zone and theselective manipulation of the temperature over a period of time. In suchan embodiment, a temperature modulation system 10 provides selectivetemperature change to a living subject and includes a fluid 52 formoderating temperature change within a selected zone 11 adjacent thesubject. At least one conduit circuit directs the fluid 52 through thezone 11 to control temperature of the zone 11 according to a selectedtarget temperature. The structure is largely as above, but the controlsystem 54 (either on its own or under the programmatic control of anattached computer 71) is programmed to control the zone temperatureaccording to a schedule of target temperatures over a selected period oftime.

In view of the aforesaid written description of the present invention,it will be readily understood by those persons skilled in the art thatthe present invention is susceptible of broad utility and application.Many embodiments and adaptations of the present invention other thanthose herein described, as well as many variations, modifications, andequivalent arrangements, will be apparent from or reasonably suggestedby the present invention and the foregoing description thereof, withoutdeparting from the substance or scope of the present invention.Accordingly, while the present invention has been described herein indetail in relation to preferred embodiments, it is to be understood thatthis disclosure is only illustrative and exemplary of the presentinvention and is made merely for purposes of providing a full andenabling disclosure of the invention. The foregoing disclosure is notintended nor is to be construed to limit the present invention orotherwise to exclude any such other embodiments, adaptations,variations, modifications and equivalent arrangements, the presentinvention being limited only by any claims appended hereto and theequivalents thereof.

The invention claimed is:
 1. A control unit for adjusting a temperatureof a fluid comprising: a pump including a first inlet, a second inlet, afirst outlet, and a second outlet; a reservoir including the fluid; anda thermoelectric device operable to adjust the temperature of the fluidin the reservoir; wherein the pump is operable to pump the fluid throughthe first outlet and into the first independent temperature zone;wherein the pump is operable to pump the fluid through the second outletand into the second independent temperature zone; wherein the pump isoperable to receive the fluid through the first inlet, wherein the firstinlet receives the fluid from a first independent temperature zone; andwherein the pump is operable to receive the fluid through the secondinlet, wherein the second inlet receives the fluid from a secondindependent temperature zone.
 2. The control unit of claim 1, whereinthe control unit is operable to wirelessly receive a target temperaturefor the first independent temperature zone and a target temperature forthe second independent temperature zone.
 3. The control unit of claim 1,wherein the control unit is operable to cause the thermoelectric deviceto heat or cool the fluid based on a target temperature of the firstindependent temperature zone or a target temperature of the secondindependent temperature zone.
 4. The control unit of claim 1, whereinthe control unit is operable to control distribution of the fluid to thefirst independent temperature zone or the second independent temperaturezone based on a target temperature of the first independent temperaturezone or a target temperature of the second independent temperature zoneor stop distribution of the fluid to the first independent temperaturezone or the second independent temperature zone based on the targettemperature of the first independent temperature zone or the targettemperature of the second independent temperature zone.
 5. The controlunit of claim 1, wherein the control unit is operable to controldistribution of the fluid to the first independent temperature zonethrough the first outlet and the second independent temperature zonethrough the second outlet simultaneously based on scheduled targettemperatures correlating to a sleep cycle of at least one user.
 6. Thecontrol unit of claim 1, wherein the control unit is operable to controldistribution of the fluid to the first independent temperature zonethrough the first outlet and the second independent temperature zonethrough the second outlet sequentially based on scheduled targettemperatures correlating to a sleep cycle of at least one user.
 7. Thecontrol unit of claim 1, wherein the first outlet is connected to afirst end of a first circuit, wherein the first independent temperaturezone includes a portion of the first circuit, wherein the second outletis connected to a first end of a second circuit, and wherein the secondindependent temperature zone includes a portion of the second circuit.8. The control unit of claim 1, wherein the pump incudes a multichannelpump or wherein the pump includes a multi-way valve.
 9. A control unitfor adjusting a temperature of a fluid comprising: a pump including afirst inlet, a second inlet, a first outlet, and a second outlet; areservoir including the fluid; and a thermoelectric device operable toadjust the temperature of the fluid in the reservoir; wherein the firstoutlet of the pump is connected to a first end of a first conduitcircuit, wherein at least a portion of the first conduit circuit isincluded in a first independent temperature zone; wherein the secondoutlet of the pump is connected to a first end of a second conduitcircuit, wherein at least a portion of the second conduit circuit isincluded in a second independent temperature zone; wherein the pump isoperable to pump the fluid through the first outlet and into the firstindependent temperature zone; wherein the pump is operable to pump thefluid through the second outlet and into the second independenttemperature zone; and wherein the first inlet receives the fluid fromthe first independent temperature zone and the second inlet receives thefluid from the second independent temperature zone.
 10. The control unitof claim 9, wherein the first independent temperature zone and thesecond independent temperature zone are embedded in a mattress or amattress topper.
 11. The control unit of claim 9, wherein the controlunit is operable to control distribution of the fluid to the firstindependent temperature zone or the second independent temperature zonebased on scheduled target temperatures correlating to a sleep cycle ofat least one user.
 12. The control unit of claim 9, wherein the controlunit is operable to receive an actual temperature of the firstindependent temperature zone and an actual temperature of the secondindependent temperature zone, and wherein the pump is operable tocontrol distribution of the fluid to the first independent temperaturezone or the second independent temperature zone based on comparison ofthe actual temperature of the first independent temperature zone to atarget temperature of the first independent temperature zone or acomparison of the actual temperature of the second independenttemperature zone to a target temperature of the second independenttemperature zone or stop distribution of the fluid to the firstindependent temperature zone or the second independent temperature zonebased on the comparison of the actual temperature of the firstindependent temperature zone to the target temperature of the firstindependent temperature zone or the comparison of the actual temperatureof the second independent temperature zone to the target temperature ofthe second independent temperature zone.
 13. The control unit of claim9, wherein the fluid is water, and wherein the first independenttemperature zone and the second independent temperature zone areembedded in a mattress or a mattress topper.
 14. The control unit ofclaim 9, wherein the control unit is operable to wirelessly receive atarget temperature for the first independent temperature zone and atarget temperature for the second independent temperature zone.
 15. Acontrol unit for adjusting a temperature of a fluid comprising: a pumpincluding at least one outlet, a first inlet, and a second inlet; and areservoir including the fluid; wherein the control unit is operable toheat and cool the fluid in the reservoir; wherein the at least oneoutlet of the pump is connected to the first independent temperaturezone and the second independent temperature zone; wherein the pump isoperable to pump the fluid through the at least one outlet and into thefirst independent temperature zone or the second independent temperaturezone; and wherein the first inlet is connected to the first independenttemperature zone, and wherein the second inlet is connected to thesecond independent temperature zone.
 16. The control unit of claim 15,wherein the control unit is operable to receive target temperatures fromat least one computing device.
 17. The control unit of claim 15, whereinthe fluid is water.
 18. The control unit of claim 15, wherein the atleast one outlet includes a first outlet and a second outlet, whereinthe first outlet is connected to the first independent temperature zoneand the second outlet is connected to the second independent temperaturezone.
 19. The control unit of claim 15, wherein the control unit isoperable to heat and cool the fluid in the reservoir using athermoelectric device.
 20. The control unit of claim 15, wherein thefirst independent temperature zone and the second independenttemperature zone are embedded in a mattress or a mattress topper.